17997332453 has 4 divisors (see below), whose sum is σ = 18032691180. Its totient is φ = 17961973728.

The previous prime is 17997332443. The next prime is 17997332497. The reversal of 17997332453 is 35423379971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35423379971 = 7 ⋅5060482853.

It can be written as a sum of positive squares in 2 ways, for example, as 14280967009 + 3716365444 = 119503^2 + 60962^2 .

It is a cyclic number.

It is not a de Polignac number, because 17997332453 - 2⁶ = 17997332389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17997332395 and 17997332404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17997332443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17678600 + ... + 17679617.

It is an arithmetic number, because the mean of its divisors is an integer number (4508172795).

Almost surely, 2^17997332453 is an apocalyptic number.

It is an amenable number.

17997332453 is a deficient number, since it is larger than the sum of its proper divisors (35358727).

17997332453 is an equidigital number, since it uses as much as digits as its factorization.

17997332453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35358726.

The product of its digits is 4286520, while the sum is 53.

The spelling of 17997332453 in words is "seventeen billion, nine hundred ninety-seven million, three hundred thirty-two thousand, four hundred fifty-three".